<?php

if(is_file($_FILES['arquivo']['tmp_name'])){

 $foto = $_FILES['arquivo']['name'];

 if(!eregi("^image\/(jpeg|png|jpg)$", $_FILES['arquivo']['type'])){

  echo "
  <META HTTP-EQUIV=REFRESH CONTENT='0; URL=index.html'>
  <script type=\"text/javascript\">
  alert(\"Formato inválido\");
  </script>
  ";

 }else{

  if(file_exists("uploads/$foto")){
   $a = 1;
   while(file_exists("uploads/[$a]$foto")){
    $a++;
   }

   $foto = "[".$a."]".$foto;

  }

  if(!move_uploaded_file($_FILES['arquivo']['tmp_name'], "uploads/".$foto)){

   echo "
  <META HTTP-EQUIV=REFRESH CONTENT='0; URL=index.html'>
  <script type=\"text/javascript\">
  alert(\"Erro ao enviar o arquivo.\");
  </script>
  ";

  }

 }

  header("Location: index.html");

}else{
 header("Location: index.html");
}

?>